1749 in music

	… 1739; 1740; 1741; 1742; 1743; 1744; 1745; ; 1746; 1747; 1748; 1749; 1750; 1751; 1752; ; 1753; 1754; 1755; 1756; 1757; 1758; 1759 …;
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Events

March 4 – Johann Sebastian Bach revives (for the last time under his leadership) his St John Passion BWV 245 (BC D 2d) with some textual and instrumentational changes at St. Nicholas Church, Leipzig. In it, he uses the contrabassoon for the first time (as a continuo instrument).
March 17 – George Frideric Handel's oratorio Solomon first performed, at the Theatre Royal in London.^[1]
April 27 – The first official performance of Handel's Music for the Royal Fireworks, in London, finishes early due to the outbreak of fire.^[1]
1749–1750 – Bach revises his The Art of Fugue BWV 1080, but the project will be left incomplete by his death and published in 1751 by his son Carl Philipp Emanuel Bach in Berlin).

May – Elisabeth Soligny, French ballerina and ballet mistress
May 5 – Jean-Frédéric Edelmann, composer (died 1794)
June 15 – Georg Joseph Vogler, (known as Abbé Vogler) German composer, teacher and theorist (died 1814)
December 17 – Domenico Cimarosa, composer (died 1801)
date unknown – Marija Zubova, composer (d. 1799)

^ ^a ^b Williams, Hywel (2005). Cassell's Chronology of World History. Weidenfeld & Nicolson. p. 313. ISBN 0-304-35730-8.